Yeah, weird title for a thread, but I didn't know how to phrase it in one short line. Here's the deal: I just landed a substitute gig from my bass teacher. It's a killer soul band with an awesome male singer. The songs range from Teddy Pendergrass to James Brown to Bobby Womack, etc. I basically have to learn about 20 songs in less than a week. It's a dream gig that I can't mess up. Here's the problem: My teacher told me the singer changes keys to most songs to accommodate his range. Not a problem if you have a 5 string, right? Well, I just sold my Sadowsky RV5 last week because it wasn't getting much use. Dumb move. So I'm thinking my solution is to do what I read Pino Palladino does, tune your bass down to C (or whatever appropriate key). The question is essentially can I just use the usual strings on the bass (probably 45 to 105 or so) or do I have to go to a heavier gauge string, thus having to file the nut? The latter is not an option since I don't know how to do it myself and I'm not going to file an expensive bone nut down. The basses in question are either a USA Lakland Bob Glaub or a Lakland Skyline Joe Osborn. Does anyone know what the highest gauge Laklands can accommodate without modification? Can anyone give me a bit of advice on this issue?